linux/include/sound/aess.h
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   1/*
   2 * AESS IP block reset
   3 *
   4 * Copyright (C) 2012 Texas Instruments, Inc.
   5 * Paul Walmsley
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License as
   9 * published by the Free Software Foundation version 2.
  10 *
  11 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  12 * kind, whether express or implied; without even the implied warranty
  13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  19 * 02110-1301 USA
  20 */
  21#ifndef __SOUND_AESS_H__
  22#define __SOUND_AESS_H__
  23
  24#include <linux/kernel.h>
  25#include <linux/io.h>
  26
  27/*
  28 * AESS_AUTO_GATING_ENABLE_OFFSET: offset in bytes of the AESS IP
  29 *     block's AESS_AUTO_GATING_ENABLE__1 register from the IP block's
  30 *     base address
  31 */
  32#define AESS_AUTO_GATING_ENABLE_OFFSET                  0x07c
  33
  34/* Register bitfields in the AESS_AUTO_GATING_ENABLE__1 register */
  35#define AESS_AUTO_GATING_ENABLE_SHIFT                   0
  36
  37/**
  38 * aess_enable_autogating - enable AESS internal autogating
  39 * @oh: struct omap_hwmod *
  40 *
  41 * Enable internal autogating on the AESS.  This allows the AESS to
  42 * indicate that it is idle to the OMAP PRCM.  Returns 0.
  43 */
  44static inline void aess_enable_autogating(void __iomem *base)
  45{
  46        u32 v;
  47
  48        /* Set AESS_AUTO_GATING_ENABLE__1.ENABLE to allow idle entry */
  49        v = 1 << AESS_AUTO_GATING_ENABLE_SHIFT;
  50        writel(v, base + AESS_AUTO_GATING_ENABLE_OFFSET);
  51}
  52
  53#endif /* __SOUND_AESS_H__ */
  54
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